Catalpa Trees: Unique Features, Uses, and Personal Experiences While catalpa trees are not generally considered highly toxic, some parts of the tree, particularly the roots, are known to be poisonous according to the USDA Plants Database. The leaves and seed pods Plant your own backyard bait tree The Arkansas Democrat Gazette Arkansas' Best News Source Indian Bean Tree Exploring Colour Now that the leaves have fallen the exposed seed pods of some species are evident, hanging from the branches and rattling in the breeze. Wonder which species of trees you'll see with Cigar Tree" Images Browse 334 Stock Photos, Vectors, and Video Adobe Stock